JP7744804B2 - machine tools - Google Patents

Description

The present invention relates to a machine tool.

For example, Patent Document 1 discloses a machine tool equipped with an independent opposed gang tool post and a back tool post. Furthermore, Patent Document 2 discloses an automatic lathe equipped with an independent opposed gang tool post.

Registered Utility Model No. 3228665 Japanese Patent Application Publication No. 06-246508

To perform complex machining using a moving-spindle lathe such as those described in Patent Documents 1 and 2, simultaneous machining using the front and rear tool rests, as well as the rear tool rest, requires the installation of an NC (numerical control) device with independent opposing tool rests, a rear tool rest, and triple control. In addition, an additional motor, for example, must be installed in the rear tool rest.

The present invention was made in consideration of the above situation, and aims to provide a machine tool that is simple in configuration but enables complex machining.

In order to achieve the above object, a machine tool according to the present invention is a machine tool for machining a workpiece, and includes a first spindle unit and a second spindle unit that hold and rotate the workpiece, and a first tool rest and a second tool rest that are movable independently of each other, wherein the first spindle unit moves along the axial direction of the first spindle, and the second spindle unit moves along the axial direction of the second spindle and a depth direction that intersects with the axial direction of the second spindle, and the first tool rest and the second tool rest are movable in the depth direction and vertical direction, respectively. The first tool rest is provided with a first comb-shaped tool having a plurality of tools arranged in a comb-like pattern in the vertical direction in a direction intersecting the axial direction of the first spindle, and the second tool rest is provided with a second comb-shaped tool having a plurality of tools arranged in a comb-like pattern in the vertical direction opposite to the first comb-shaped tool in a direction intersecting the axial direction of the first spindle, and a case part is fixed to either the first tool rest or the second tool rest, and a first outer surface part of the case part is provided with a second comb-shaped tool having a plurality of tools arranged in a comb-like pattern in the vertical direction in a direction intersecting the axial direction of the first spindle. a plurality of first rotating tools for machining one end of the workpiece held by the first spindle, the plurality of first rotating tools being rotated around a direction parallel to the axial direction of the second spindle; and a plurality of second rotating tools for machining the other end of the workpiece held by the second spindle, the plurality of first rotating tools being rotated around a direction parallel to the axial direction of the second spindle, the plurality of first rotating tools and the plurality of second rotating tools being rotated by a single motor; The machine tool is provided with a numerical control device that numerically controls the tool post and the second tool post using two-system control and processes the workpiece using the first gang tool and the second gang tool, the first gang tool or the second gang tool including the plurality of first rotary tools, and all tools provided on the machine tool are provided directly or indirectly on the first tool post and the second tool post, and the workpiece can be simultaneously processed by the first tool post and the second tool post on which all tools are provided .

The present invention provides a machine tool that is simple in configuration but capable of complex machining.

1 is a front view of a machine tool according to an embodiment of the present invention; 1 is a plan view of a machine tool according to an embodiment of the present invention; 3 is a cross-sectional view taken along line AA in FIG. 2. 3A is a view seen from the arrow B in FIG. 3, FIG. 3B is a view seen from the arrow C in FIG. 3A, and FIG. 3C is a cross-sectional view taken along the line DD in FIG. 3A. 1A to 1E are diagrams showing examples of machining performed by a machine tool according to an embodiment of the present invention.

Hereinafter, a machine tool according to an embodiment of the present invention will be described with reference to the drawings.
As shown in Figures 1 to 3, machine tool 1, which is a lathe, includes a bed S, which is a base of machine tool 1, a first spindle unit 10 having a first spindle 11, a second spindle unit 20 having a second spindle 21, a first spindle moving mechanism 13Z, a second spindle moving mechanism 23Z, a second spindle moving mechanism 24X, a first tool rest 15, a first tool unit 16, a second tool rest 17, a second tool unit 18, a first tool rest moving mechanism 31X, a first tool rest moving mechanism 32Y, a second tool rest moving mechanism 41X, and a second tool rest moving mechanism 42Y.
Hereinafter, the axial direction along the rotation axis of the first main shaft 11 and the second main shaft 21 is defined as the Z-axis direction, the height direction perpendicular to the Z-axis direction is defined as the Y-axis direction, and the direction perpendicular to the Y-axis and Z-axis directions is defined as the X-axis direction.

As shown in Fig. 1, the first spindle unit 10 holds and rotates a workpiece W. Specifically, the first spindle unit 10 includes a first spindle 11 and a first headstock 12 that rotatably supports the first spindle 11. The first spindle 11 holds one end of the workpiece W. The workpiece W is supplied by a bar supply device (not shown). A workpiece rotation motor (not shown) that rotates the first spindle 11 is built into the first headstock 12.
A portion of the workpiece W outside the first spindle 11 is rotatably supported by a workpiece support portion 14. Specifically, the workpiece support portion 14 is provided with a guide bush 14a that contacts the outer periphery of the workpiece W, and the guide bush 14a rotates in synchronization with the rotation of the first spindle 11, so that even if the workpiece W moves in the Z-axis direction, it is rotatably supported by being supported by the guide bush 14a.

The second spindle unit 20 is located opposite the first spindle unit 10 in the Z-axis direction, and holds and rotates the workpiece W received from the first spindle unit 10. The second spindle unit 20 includes a second spindle 21 that holds the other end of the workpiece W, and a second headstock 22 that rotatably supports the second spindle 21. A workpiece rotation motor (not shown) that rotates the second spindle 21 is built into the second headstock 22.

1, the first spindle moving mechanism 13Z moves the first spindle unit 10 in the Z-axis direction. The second spindle moving mechanism 23Z moves the second spindle unit 20 in the Z-axis direction.
As shown in FIG. 2 , the second spindle moving mechanism 24X moves the second spindle unit 20 in the X-axis direction so that it can face the first spindle 11 and the tools of the second tool rest 17 and second tool unit 18.

As shown in FIG. 1, the first spindle moving mechanism 13Z includes a support base 13a, a ball screw 13b, a bearing 13c, a bearing 13d, a nut 13e, and a motor 13M.
The support base 13a is formed integrally with the bed S and is a portion that protrudes upward from the wide flat portion of the bed S. Bearings 13c and 13d are arranged on the support base 13a along the Z-axis direction. The ball screw 13b is rotatably supported by the bearings 13c and 13d and is arranged to extend in the Z-axis direction. The nut 13e is fitted onto the outer periphery of the ball screw 13b and is fixed to the underside of the first headstock 12.
The motor 13M is attached to the support base 13a. The output shaft of the motor 13M is coaxially connected to one end of the ball screw 13b, and the motor 13M rotates the ball screw 13b under the control of the control unit 300. The rotation of the ball screw 13b causes the nut 13e to move in the Z-axis direction together with the first headstock 12 along the ball screw 13b.

The second spindle movement mechanism 23Z includes a motor 31M and, like the first spindle movement mechanism 13Z, a support base, a ball screw, a bearing, and a nut. The second spindle movement mechanism 23Z is provided on the second spindle movement mechanism 24X.

The second spindle moving mechanism 24X includes a support base 24a, a ball screw 24b, a bearing 24c, a bearing 24d, a nut 24e, a rail 24g, a block 24h, and a motor 24M.
The support base 24a is formed integrally with the bed S and is a plate-like portion that protrudes upward from the wide flat portion of the bed S. Bearings 24c and 24d are also arranged on the bed S along the X-axis direction. The ball screw 24b is rotatably supported by the bearings 24c and 24d and is arranged to extend in the X-axis direction. The nut 24e is fitted onto the outer periphery of the ball screw 24b and is fixed to the underside of the support base of the second spindle movement mechanism 23Z. A pair of rails 24g are each fixed to the support base 24a. A pair of blocks 24h are slidably provided along the rails 24g. The surface of the block 24h opposite the sliding portion is fixed to the underside of the support base of the second spindle movement mechanism 23Z.
The motor 24M is attached to the bed S. The output shaft of the motor 24M is coaxially coupled to one end of the ball screw 24b, and the motor 24M rotates the ball screw 24b under the control of the control unit 300. The rotation of the ball screw 24b causes the nut 24e to move in the X-axis direction together with the second spindle moving mechanism 23Z along the ball screw 24b.

The first tool post movement mechanism 31X is provided on the support base 13a of the first spindle movement mechanism 13Z and near the end of the first spindle 11. The first tool post movement mechanism 31X moves the first tool post movement mechanism 32Y in the X-axis direction. Accordingly, the first tool post 15 also moves in the X-axis direction.
The first tool rest movement mechanism 32Y is attached to the first tool rest movement mechanism 31X on the side of the second spindle unit 20. The first tool rest movement mechanism 32Y moves the first tool rest 15 in the Y-axis direction.

A base 50 is disposed on the support table 13a near the first spindle 11. The base 50 is integrally configured on the left and right sides of the first spindle 11, to which the above-mentioned guide bush 14a is attached, and also constitutes part of the first tool post movement mechanism 31X and the second tool post movement mechanism 41X.
Like the second spindle movement mechanism 24X, the first tool post movement mechanism 31X includes a base 50 corresponding to the support base 24a, a ball screw, a bearing, a nut, a rail, and a block (not shown) in addition to the motor 31M. The rail mounting surface of the base 50 faces the second spindle unit 20. Two rails extending in the X-axis direction are attached to the base 50 side by side in the vertical direction. The motor 31M is attached to the side of the base 50.
The first tool rest moving mechanism 32Y includes a motor 32M and, similarly to the second spindle moving mechanism 24X, a support base, a ball screw, a bearing, a nut, a rail, and a block (not shown).
The first tool rest 15 is provided on the second spindle unit 20 side of the first tool rest moving mechanism 32Y.

The second tool post movement mechanism 41X is provided alongside the first tool post movement mechanism 31X on the support base 13a of the first spindle movement mechanism 13Z. The second tool post movement mechanism 41X moves the second tool post movement mechanism 42Y in the X-axis direction. Accordingly, the second tool post 17 also moves in the X-axis direction.
The second tool rest movement mechanism 42Y is attached to the second tool rest movement mechanism 41X. The second tool rest movement mechanism 42Y moves the second tool rest 17 in the Y-axis direction.

Similar to the first tool post movement mechanism 31X, the second tool post movement mechanism 41X includes a base 50 corresponding to the support base 24a, a ball screw, a bearing, a nut, rails, and a block (not shown) in addition to the motor 41M. Similar to the first tool post movement mechanism 31X, the second tool post movement mechanism 41X has two rails extending in the X-axis direction that are attached to the base 50 side by side in the vertical direction. The motor 41M is attached to the side of the base 50.
The second tool rest movement mechanism 42Y includes a motor 42M and, similarly to the first tool rest movement mechanism 32Y, a support base, a ball screw, a bearing, a nut, a rail, and a block (not shown).
The second tool rest 17 is provided on the second spindle unit 20 side of the second tool rest moving mechanism 42Y.

Tool 15b and rotary tool 16a are attached to the first tool rest 15. Of these, rotary tool 16a is included in the first tool unit 16 attached to the first tool rest 15.

A plurality of tools 15b arranged in a gang shape in the Y-axis direction are arranged on the first tool rest 15. The plurality of tools 15b are held on the first tool rest 15 along the X-axis direction with their cutting edges facing the workpiece W. The tools 15b are, for example, turning tools, and machine the front surface of the workpiece W held by the first spindle 11. In addition, a drill holder 15c for attaching a drill for machining the front surface of the workpiece W is arranged on the first tool rest 15.
The first tool unit 16 is a cross drill device located above the tool 15b and the drill holder 15c. The first tool unit 16 is located in correspondence with the second tool unit 18 in the X-axis direction. The first tool unit 16 is provided with a plurality of rotary tools 16a for machining the protruding cylindrical portion on the front of the workpiece W. The plurality of rotary tools 16a are arranged vertically in a comb-like pattern, with their respective tips facing the workpiece W along the X-axis.
3, a first comb-shaped tool 15T including a tool 15b and a rotary tool 16a is attached to the first tool rest 15. In this specification, the term "comb-shaped" refers to tools arranged vertically, and the tool 15b and the rotary tool 16a may be spaced apart in the Z-axis direction.
The first tool unit 16 also includes a motor 16M that rotates the rotary tool 16a under the control of the control unit 300.

Tool 17b, rotating tool 18a, fixed tool 18b, and rotating tool 18c are attached to the second tool rest 17. Of these, rotating tool 18a, fixed tool 18b, and rotating tool 18c are included in the second tool unit 18 attached to the second tool rest 17.

A plurality of tools 17b arranged in a comb shape in the Y-axis direction are arranged on the second tool rest 17. The plurality of tools 17b are held on the second tool rest 17 along the X-axis direction with their cutting edges facing the workpiece W. The tools 17b are, for example, turning tools, and machine the front surface of the workpiece W held by the first spindle 11. The plurality of tools 15b and the plurality of tools 17b are arranged so that their cutting edges face each other in the X-axis direction.
The second tool unit 18 is a cross drill device located above the tool 17b. The second tool unit 18 is located in correspondence with the first tool unit 16 in the X-axis direction. The second tool unit 18 is provided with a plurality of rotary tools 18a for machining the protruding cylindrical portion on the front side of the workpiece W. The plurality of rotary tools 18a are arranged vertically in a comb-like pattern, with their respective tips facing the workpiece W along the X-axis.
3, a second gang tool 17T including a tool 17b and a rotary tool 18a is attached to the second tool rest 17. The tool 17b and the rotary tool 18a may be spaced apart in the Z-axis direction.
In addition, a fixed tool 18b, which is, for example, a drill, and a rotary tool 18c, which is, for example, a drill, are arranged along the Z axis so that their respective tips face the second spindle unit 20. After the workpiece W is transferred from the first spindle 11 to the second spindle 21, the fixed tool 18b and the rotary tool 18c machine the end face portion of the back surface of the workpiece W.
The second tool unit 18, which includes a rotary tool 18a for front processing and a fixed tool 18b and rotary tool 18c for back processing, is preferably provided on the tool post on the side closer to the operator so that work such as tool replacement can be easily performed.
The second tool unit 18 also includes a motor 18M that rotates the rotary tools 18a and 18c under the control of the control unit 300. Therefore, the rotary tools 18a and 18c are rotationally driven by the single motor 18M.

The first tool post 15 and the second tool post 17 are configured as independent opposing tool posts by the first tool post moving mechanism 31X and the first tool post moving mechanism 32Y, and the second tool post moving mechanism 41X and the second tool post moving mechanism 42Y.
The reason why the movement directions of the first tool post 15 and the second tool post 17 are set to two axes, the X-axis and the Y-axis, is that if the first main spindle 11 is fixed and the first tool post 15 and the second tool post 17 are moved in the Z-axis direction, they will move in three axes, and errors due to the movement will accumulate, which could result in a decrease in machining accuracy.

1 to 3, each part of the machine tool 1 operates under the control of a control unit 300. The control unit 300 controls the first spindle unit 10, the second spindle unit 20, the first spindle moving mechanism 13Z, the second spindle moving mechanism 23Z, the second spindle moving mechanism 24X, the first tool post moving mechanism 31X, the first tool post moving mechanism 32Y, and the first tool unit 16 for the first tool post 15, and the second tool post moving mechanism 41X, the second tool post moving mechanism 42Y, and the second tool unit 18 for the second tool post 17. As a numerical control device for tools, it functions in two systems, one for the first tool post 15 and the other for the second tool post 17.
The control unit 300 includes, for example, a CPU (Central Processing Unit) not shown, a ROM (Read Only Memory) that stores a program that defines the procedure of processing by the CPU, and the like.
The program is an NC program, which includes command codes for the feed rate and rotation speed of the workpiece (spindle), the type of tool used for machining, the coordinate position of the tool, and so on.

Next, the structure of the second tool unit 18 will be described in more detail with reference to Figures 4(a) to (c).

As shown in Figure 4(c), motor 18M is attached to housing 100 along the X-axis. Tool holders such as shaft 107 and gears such as bevel gear 102 are also attached to housing 100. A spur gear 104 is fitted to the outer surface of motor shaft 103, which is aligned along the X-axis of motor 18M. Spur gears 105 are fitted to shafts 107, which are rotatably supported and have multiple rotary tools 18a attached, also extending along the X-axis. Gear 104 meshes with one of the multiple gears 105, and the gears 105 for the aligned shafts 107 mesh with the adjacent gears 105.

Furthermore, bevel gear 102, which extends along the X-axis like motor shaft 103 of motor 18M, meshes with gear 104 at a spur gear near one end. The other end of bevel gear 102 is a bevel gear, which meshes with the bevel gear at one end of bevel gear 101 extending along the Z-axis, as shown in FIG. 4(b). The longitudinal center of bevel gear 101 is a spur gear, which meshes with one of spur gears 106 fitted to each of shafts 108 to which rotary tool 18c is attached and rotatably supported, as shown in FIG. 4(a). Gears 106 for multiple shafts 108 aligned in a row mesh with adjacent gears 106.

In the second tool unit 18 configured as described above, when the motor 18M is rotated under the control of the control unit 300, the multiple rotary tools 18a and the multiple rotary tools 18c rotate via gears and shafts. In this way, by driving the rotary tools 18a and 18c with a single motor 18M, the number of motors can be reduced, leading to lower costs.

Next, various methods for machining the workpiece W will be described with reference to Figures 5(a) to (e). The first workpiece W1 to be machined is held by the first spindle 11 in Figure 1, and the second workpiece W2 is held by the second spindle 21. After being machined, the product is received by a workpiece separator (not shown) and then transported outside the machine tool 1 by a workpiece conveyor (not shown).

Figure 5(a) shows an example of balance turning. In this process, the workpiece W is rotated by the first spindle 11 while the first spindle movement mechanism 13Z moves the workpiece W in the Z-axis direction. Rough machining is performed on the first workpiece W1 with tool 17b, and simultaneously, finish machining is performed with tool 15b. It is not necessary to perform both processes simultaneously.

Figure 5(b) shows an example of simultaneous cross machining. In this machining, the rotation of the workpiece W by the first spindle 11 is stopped, and the workpiece W is not fed in the Z-axis direction. The rotating tool 16a and the opposing rotating tool 18a each perform drilling and other operations on the first workpiece W1. By performing simultaneous machining with both opposing rotating tools, the machining time can be shortened.

Figure 5(c) shows another example of simultaneous cross machining. In this machining, the rotation of the workpiece W by the first spindle 11 is stopped, and the workpiece W is fed in the Z-axis direction. Also, in this machining, the rotating tool 16a and the rotating tool 18a are end mills, not drills. The rotating tool 16a and the opposing rotating tool 18a each perform milling on the first workpiece W1.

5(d) shows an example of overlap machining. In this machining, the first workpiece W1 is rotated by the first spindle 11, and the first workpiece W1 is fed in the Z-axis direction by the first spindle moving mechanism 13Z, and turning or the like is performed on the first workpiece W1 by the tool 15b.
When the front surface machining is completed, the second spindle 21 receives the workpiece W whose front surface has been machined from the first spindle 11. After receiving the workpiece W, the second spindle 21 moves in the XZ directions to position the second workpiece W2 opposite 18c. To machine the workpiece W2, the second spindle 21 is moved in the Z-axis direction by the second spindle moving mechanism 23Z while rotating the rotary tool 18c, and the back surface machining is performed on the second workpiece W2 by the rotary tool 18c.
A second tool unit 18 equipped with rotary tools for front and back machining is provided on either the front or rear tool post. Therefore, after the first spindle 11 has machined the front side of the workpiece W, the second spindle 21 to which the workpiece W has been handed over can immediately machine the back side, shortening movement time and reducing machining time. In addition, complex machining can be performed by using different tools for each tool post.

5(e) shows the same as FIG. 5(d) regarding the machining of the first workpiece W1, but shows that the second tool unit 18, which is not used to machine the first workpiece W1, moves in the X-axis direction indicated by the arrow during machining of the first workpiece W1. This allows the rotary tool 18a, for example, as shown in FIG. 5(b), to be prepared while the first workpiece W1 is being machined by the tool 15b.
Because the first tool rest 15 and the second tool rest 17 are independent opposing tool rests, it is possible to eliminate tool change time as described above. On the other hand, in a non-independent, integrated opposing tool rest, for example, while a workpiece W is being machined with a tool on the front tool rest, it is not possible to move the tool on the rear tool rest that will be used for machining next, so the tool must be changed after the workpiece is machined, which increases the machining time.

(effect)
According to the embodiment described above, the following effects are achieved.
(1) In the above embodiment, the conventional rear tool rest is eliminated, and instead, rotary tools for front and rear machining (rotary tools 18a and 18c) are mounted on the front tool rest (second tool rest 17) of the independently opposed tool rest. This results in a machine tool that can be configured simply. In particular, even with a two-path control numerical control device, simultaneous machining of the front tool rest and the rear tool rest, and simultaneous machining of the front side of the rear tool rest and the rear side of the front tool rest are possible.
In addition, by eliminating the rear tool post, chips are less likely to accumulate during rear machining. In addition, it is easier for the operator to see the tip of the spindle (machining point) and to set tools on the front and rear tool posts.
Furthermore, by moving the first spindle 11 along the Z-axis direction using the first spindle moving mechanism 13Z, the accumulation of errors caused by the tool post also moving in the Z-axis direction is prevented, and workpieces W ranging from long to short can be accommodated.
Furthermore, as shown in the above embodiment, a wide variety of rotary tools can be used, so that even workpieces with complex shapes can be machined in a short time.

(2) In the above embodiment, the second tool unit 18 equipped with rotary tools for front and back machining is provided on the front tool rest, i.e., the tool rest on the side closer to the operator.
The second tool unit 18 is located closer to the operator, making it easier to perform tasks such as tool replacement.

(3) In the above embodiment, in the second tool unit 18, the rotary tool 18a for front surface machining and the rotary tool 18c for back surface machining are each rotationally driven by a single motor 18M.
Conventionally, the rotary tool for the front surface and the rotary tool for back surface processing are located in different places, and two motors are used to drive the rotary tools, but in the above embodiment, this can be reduced to one, thereby reducing costs.
Furthermore, conventionally, in order to perform complex machining, the rear tool post is equipped with a function to move in the Y-axis direction, but in the above embodiment, the Y-axis function of the second tool unit 18 is shared with the Y-axis function of the second tool post 17, thereby eliminating the need for a Y-axis motor for the rear tool post and reducing costs.
Therefore, a total of two motors can be eliminated.

(4) In the above embodiment, by providing rotary tools 16a and 18a on the front and rear tool rests, overlapping machining (simultaneous machining) is possible, shortening machining time. Furthermore, complex machining such as drilling and milling is possible.

(5) In the above embodiment, the first tool rest 15 and the second tool rest 17 are numerically controlled using two-system control, and the control unit 300 is provided as a numerical control device that processes the workpiece W with each tool.
Previously, a machining system was required for each of the three tool rests (front tool rest, rear tool rest, and back tool rest), which required three numerical control systems.As a result, a program was required for each tool rest, and previously there were three programs.
In contrast to this, in this embodiment, a function equivalent to that of a conventional back tool rest is mounted on the second tool rest 17, which is the front tool rest, as a second tool unit 18 equipped with rotary tools for front and back machining. Therefore, there are two tool rests, the front tool rest and the rear tool rest, and two systems of numerical control devices may be used.
Although a program is required for each tool post, in this embodiment only two programs are required, which reduces the time required to create programs and makes it easier to debug the programs compared to the conventional method.

Note that this disclosure is not limited to the above-described embodiments and drawings. Modifications (including the deletion of components) may be made as appropriate within the scope of the gist of this disclosure. An example of a modification is described below.

(Modification)
In addition to the drill and end mill of the above embodiment, many other types of tools may be attached to the first tool unit 16 and the second tool unit 18. Also, tools equivalent to the fixed tool 18b and the rotary tool 18c may be attached to the first tool unit 16.

The types and arrangement of tools on the first tool post 15 and second tool post 17 may be other than those described in the above embodiment and are optional.

In addition to the rotating tools 16a and 18a of the above embodiment, fixed tools, for example, may be attached to the first tool unit 16 and the second tool unit 18. This increases the number of tools, enabling a greater variety of machining operations. The first tool unit 16 may also be equipped with tools similar to those in the second tool unit 18.

The workpiece W and the tool only need to move relative to each other. Therefore, for example, in addition to the first spindle movement mechanism 13Z, a mechanism for moving the first tool rest 15 and the second tool rest 17 in the Z-axis direction may also be used.

In the above embodiment, it is described that the first gang tool 15T including the tool 15b and the rotary tool 16a is provided on the first tool rest 15. It is also described that the second gang tool 17T including the tool 17b and the rotary tool 18a is provided on the second tool rest 17.
Here, the first comb tool 15T may be composed of only either the tool 15b or the rotary tool 16a, or one or both of the tool 15b and the rotary tool 16a may be a single tool.
The second comb tool 17T may also be configured to consist of only either the tool 17b or the rotary tool 18a, or one or both of the tool 17b and the rotary tool 18a may be a single tool.

1...machine tool, 10...first spindle unit, 11...first spindle, 12...first spindle stock, 13a...support base, 13b...ball screw, 13c...bearing, 13d...bearing, 13e...nut, 13M...motor, 13Z...first spindle movement mechanism, 14...workpiece support, 14a...guide bush, 15...first tool rest, 15b...tool, 15c...drill holder, 15T...first gang tool, 16...first machine tool unit, 16a...rotary tool (third rotary tool), 16M...motor, 17...second tool rest, 17b...tool, 17T...second gang tool, 18...second tool unit, 18a...rotary tool (first rotary tool), 18b...fixed tool, 18c...rotary tool (second rotary tool), 18M...motor, 20...second spindle unit, 21...second spindle, 22...second spindle stock, 23a...support base, 23 b...ball screw, 23c...bearing, 23d...bearing, 23e...nut, 23M...motor, 23Z...second spindle movement mechanism, 24a...support base, 24b...ball screw, 24c...bearing, 24d...bearing, 24e...nut, 24g...rail, 24h...block, 24M...motor, 24X...second spindle movement mechanism, 31M...motor, 31X...first tool rest movement mechanism, 32M...motor, 32Y...first blade Tool post movement mechanism, 41M...motor, 41X...second tool post movement mechanism, 42M...motor, 42Y...second tool post movement mechanism, 50...base, 100...casing, 101...bevel gear, 102...bevel gear, 103...motor shaft, 104...gear, 105...gear, 106...gear, 107...shaft, 108...shaft, 300...controller, S...bed, W...workpiece, W1...first workpiece, W2...second workpiece

Claims (6)

A machine tool for machining a workpiece,
a first spindle unit and a second spindle unit that hold and rotate the workpiece;
a first tool rest and a second tool rest that are movable independently of each other;
Equipped with
the first spindle unit moves along the axial direction of the first spindle,
the second spindle unit moves along an axial direction of the second spindle and a depth direction intersecting the axial direction of the second spindle,
the first tool rest and the second tool rest move along the depth direction and the vertical direction, respectively;
a first comb-shaped tool having a plurality of tools arranged in a comb shape in a vertical direction in a direction intersecting an axial direction of the first spindle is provided on the first tool rest;
a second gang tool having a plurality of tools arranged in a vertical direction in a comb shape facing the first gang tool and in a direction intersecting the axial direction of the first spindle is provided on the second tool rest;
a housing portion is fixed to either the first tool rest or the second tool rest,
a first outer surface portion of the housing portion is provided with a plurality of first rotary tools that rotate about a direction parallel to the depth direction and that machine one end portion of the workpiece held by the first spindle;
a second outer surface portion adjacent to the first outer surface portion of the housing portion is provided with a plurality of second rotary tools that machine the other end of the workpiece held by the second spindle so as to rotate about a direction parallel to the axial direction of the second spindle ;
the plurality of first rotary tools and the plurality of second rotary tools are each rotationally driven by a single motor;
the machine tool includes a numerical control device that numerically controls the first tool rest and the second tool rest using dual-system control and processes the workpiece with the first gang tool and the second gang tool,
the first comb tool or the second comb tool includes the plurality of first rotary tools,
all tools provided on the machine tool are provided directly or indirectly on the first tool rest and the second tool rest,
The first tool rest and the second tool rest, on which all the tools are provided, enable simultaneous machining of the workpiece.
Machine tools. The housing has a substantially box-shaped outer shape,
the plurality of outer surface portions of the housing include a third outer surface portion fixed to either the first tool post or the second tool post, and a fourth outer surface portion to which the one motor is attached;
The machine tool according to claim 1. In the housing portion, adjacent outer surface portions are perpendicular to each other,
the fourth outer surface portion faces the first outer surface portion,
the output shaft of the motor transmits power to the first rotary tool, the rotation axis of which is parallel to the output shaft of the motor, via a spur gear, and transmits power to the second rotary tool, the rotation axis of which is perpendicular to the output shaft of the motor, via a bevel gear;
The machine tool according to claim 2. a plurality of fixed tools are provided adjacent to the plurality of second rotary tools on the second outer surface portion;
The machine tool according to any one of claims 1 to 3. The movement of the headstock and tool rest in the machine tool is as follows:
movement of the first spindle unit in a direction along the axial direction of the first spindle;
movement of the second spindle unit in an axial direction of the second spindle and a direction along a depth direction intersecting the axial direction of the second spindle;
the first tool rest and the second tool rest are limited to movement only in the depth direction and the vertical direction, respectively;
The machine tool according to any one of claims 1 to 4. of the first tool rest and the second tool rest, the tool rest facing the tool rest equipped with the plurality of first rotary tools is equipped with a third rotary tool whose orientation is fixed in a direction intersecting an axial direction of the first spindle and facing the plurality of first rotary tools of the workpiece;
The machine tool according to any one of claims 1 to 5 .